code: def _strip_protocol(cls, path):
      path = stringify_path(path)
      if path.startswith("mock://"):
          path = path[7:]
      return path
  
imports: import posixpath
  import shutil
  from pathlib import Path
  from unittest.mock import patch
  import fsspec
  import pytest
  from fsspec.implementations.local import AbstractFileSystem, LocalFileSystem, stringify_path
label_desc: Use image node_id 13 for calling the MockFileSystem obj's underlying member method code with example usage: obj._strip_protocol(cls, path) and returns: path